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26 de ex de clasa 5 cu ecuati va rog rpd dau coroana

Răspuns :

2x-8=0
2x=8
x=8/2
x=4
3x-x=6
2x=6
x=6/2
x=3
5x-8=3x+2
5x-3x=2+8
2x=10
x=10/2
x=5
9x-80=1
9x=1+80
9x=81
x=81/9
x=9
7x-49=0
7x=49
x=49/7
x=7
16x-49=1+11x
16x-11x=1+49
5x=50
x=50/5
x=10
8x-64=0
x=64/8
x=8
3x-48=0
3x=48
x=48/3
x=16
6x-78=0
6x=78
x=78/6
x=13